Exhaust mechanism.



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`\VILLIAM HOOD, OF HORNELLSVILLE, NEW YORK.

EXHAUST MECHANISW.

SPECIFICATION forming part of Letters Patent .No. '713,641, dated. November 18, 1902.

Application filed March 10, 1902. Serial No. 97,638. (No model.)

To (ol-7, whom, 't may concern:

Be it known that LVVILLIAM HOOD, of Hornellsville, county of Steuben, and State of New York, have invented certain new and useful Improvements in Exhaust Mechanisms; and I do hereby declare that the following is a full and clear description thereof.

Myinvention relates to exhaust nechanisms, and is designed for any use to Whichit is adapted.

More particularly stated, ny invention relates to locomotive exhaust-nozzles, and the particular type of nozzle comprises a separate exhaust-passage for each cylindeywhich passages merge into a common annular exhaust-opening.

The object of my invention is to provide an eXhaust-nozzle composed of two parts adapted to be securely adjusted and Secured together, so as to provide a single exhaustopening, whereby an effective Construction is Secured, resultingin the practical elimination of any back pressure from the cylinders, an economical saving in 'uel, and a constant production of a vacuum over the fire-bed when in use. For these purposes my inventon consists in the following Construction and arrangenent, which will first be particularly set forth and the features of novelty then pointed out and claimed.

Figure l represents a central longitudinal sectional elevation of my invention. Fig. 2 is a top View thereof. Fig. 3 is a bottom View. Fig. 4 is a top view With the annular coverplate removed. Fig. 5 is a transverse vertical section through the cover-plate.

The eXhaust-nozzle com prises, preterabl y, a cast-metal main portion 1, having a central partition 2 extending throughout the length of the nozzle. The partition 2, at a point about mid-length of the nozzle, is provided with an inverted conical portion terminating in a fiat circular top i. The base of the nozzle is provided with fastening means, as 5,

securely attaching the nozzle to the top of the eXhaust-passages from the cylinders.

The top of the main portion 1 is provided with a fiange 6, and the top plate-cover 7 is also provided with fianges S. Suitable fastening means secure the flanges 6 and 8. The outer edge of the top 4: ofthe cone portion 3 and the inner circular edge of the covcr-plate 7 form between them an annular nozzle,

through which the eXhaust-steam is ejected. The inner face of the cover-plate 7 is provided with a cu'rved defiecting part 9, registering at its lower edge With the inner wall of the main portion l and curving inwardly at its upper end toward the annular orifice.

It Will be noted that the conical portion 3 projects above the top of the main portion l a distance equal to the thickness of the coverplate 7, permitting the cover-plate to be bolted securely to the main portion l and preseuting a fiat surface in one plane at the top of the nozzle.

The partition or rib 2 is carried clear to the top of the main portion, the division in the rib connencing at the base of the inverted conical part and continuing upon opposite sides, uniting the outer wall and the opposite sides of the inverted cone.

The lower part 10, including the outer Wall and the partition, is thickened in the immediate neighborhood of the base of the eXhaustnozzle.

The whole structure forms a compact, strong, and simple device which is remarkably efficient in performing the functions hereinbefore referred to.

I have found in practice that the efficiency of the exhaust of the cylinders of a locomotive is increased largely by the employment of a long inverted cone which separates the alternate exhaust and permits it to commingle only at the extreme end of the nozzle.

What I claim as new, and desire to secure by Letters Patent, is

In an eXhaust-nozzle, the combination with an outer casing, a central partition and an inverted cone, all cast in one piece, said partition extending diametrically throughout the length of the pipe, and diametrically upon both sides of the cone to a point just below the top of the cone, of a cover-plate Secured to the top of the nozzle having an annular chanber just above the partition for converging the exhaust from both sides of the partitiou at the extreme end of the nozzle.

In testimony whereof I have afixed my signature in the presence of two witnesses.

VVILLIAM HOOD.

VVitnesses:

J. K. OHAPMAN, L. T. HOWARD. 

